Nice!! Very clean and attractive gradient. You've used squirrel which I haven't tried and you got a dc_ to only color one part of the flame. Did you change the DC value in the color tab?
When I've used a dc_ plugin I end up with the whole flame colored that way. It doesn't seem to matter if it's in the 1st or last xform (not the final ofc) everything ends up rainbowed. I'll have to try some more!
Please make sure you add it to your favourites to get even more exposure!
Happy Holidays!